To better understand why machine learning works, we cast learning problems as searches and characterize what makes searches successful. We prove that any search algorithm can only perform well on a narrow subset of problems, and show the effects of dependence on raising the probability of success for searches. We examine two popular ways of understanding what makes machine learning work, empirical risk minimization and compression, and show how they fit within our search frame-work. Leveraging the “dependence-first” view of learning, we apply this knowledge to areas of unsupervised time-series segmentation and automated hyperparameter optimization, developing new algorithms with strong empirical performance on real-world problem classes.

This study argues that the American Relief Administration (ARA) operationally and culturally was defined by the character and experiences of First World War American military veterans. The historiography of the American Relief Administration in the last half-century has painted the ARA as a purely civilian organization greatly detached from the military sphere. By examining the military veterans of the ARA scholars can more accurately assess the image of the ARA, including what motivated their personnel and determined their relief mission conduct. Additionally, this study will properly explain how the ARA as an organization mutually benefited and suffered from its connection to the U.S. military throughout its European missions, in particular, the 1921 Russian famine relief expedition.

博士（経済学） / 甲第457号 / 124p / Hitotsubashi University

No description available.

Lors de l’été 1968, des images d’enfants décharnés, souffrant de maladies dues à la malnutrition affluent dans les médias occidentaux. Elles proviennent de la région sud orientale de la Fédération du Nigeria, qui a déclaré son indépendance une année auparavant sous le nom de République du Biafra, où se déroule une guerre civile qui oppose les troupes fédérales aux indépendantistes biafrais. L’émotion suscitée en Occident par les représentations du conflit et de la famine qui l’accompagne engendre la mobilisation de diverses organisations humanitaires, qui mettent sur pied des opérations de secours internationales destinées aux populations civiles. Encore peu étudiées par l’historiographie, la crise du Biafra et les réponses qui y sont apportées par les acteurs occidentaux sont l’objet de cette thèse. La recherche examine tout d’abord comment une guerre civile africaine prend la dimension d’une crise humanitaire internationale. Pour ce faire, elle analyse tant la situation sur place que les acteurs de son internationalisation et ses représentations. Ensuite, afin d’appréhender les opérations de secours dans leur complexité la thèse étudie le processus d’élaboration et le déploiement des réponses occidentales à la crise, ainsi que leur réception au Nigeria dans un contexte post-colonial. Enfin, la thèse questionne les principaux éléments qui ont fait du Biafra un moment charnière de l’histoire de l’humanitaire et met en lumière les reconfigurations des discours et des pratiques de l’aide humanitaire qui s’opèrent à la fin des années 1960. / In the summer of 1968, pictures of emaciated children, suffering from diseases due to malnutrition, poured in western medias. They came from the eastern region of the Federation of Nigeria, which had proclaimed its independence one year before and taken the name of the Republic of Biafra. War and famine that were taking place in the region generated widespread concern in the West, where humanitarian organizations decided to set up international relief operations to help alleviate the suffering of the civilian population. Still understudied by the historiography, the crisis in Biafra and the mobilization of western organizations are the subjects of this PhD. Firstly, the dissertation examines how an African civil war became an international humanitarian crisis. To this purpose, it analyses the situation in the ground, the actors of its internationalization and how it was represented. Secondly, in order to grasp the complexity of humanitarian aid, the dissertation studies the elaboration and the deployment of the relied operations, as well as their reception in Nigeria in a post-colonial context. Finally, the thesis questions why Biafra is usually considered as a turning point in the history of humanitarianism. By so doing, it sheds light on the reconfigurations of the discourses and practices of humanitarian aid that took place in the late 1960’s.

Yes / Objectives: We compared δ15N and δ13C values from bone and dentine collagen profiles of individuals interred in famine‐related and attritional burials to evaluate whether individuals in medieval London who experienced nutritional stress exhibit enriched nitrogen in bone and tooth tissue. Dentine profiles were evaluated to identify patterns that may be indicative of famine during childhood and were compared with the age of enamel hypoplasia (EH) formation to assess whether isotopic patterns of undernutrition coincide with the timing of physiological stress. Materials and Methods: δ15N and δ13C isotope ratios of bone collagen were obtained from individuals (n = 128) interred in attritional and famine burials from a medieval London cemetery (c. 1120–1539). Temporal sequences of δ15N and δ13C isotope profiles for incrementally forming dentine collagen were obtained from a subset of these individuals (n = 21). Results: Results indicate that individuals from attritional graves exhibit significantly higher δ15N values but no significant differences were found between burial types for the sexes. Analyses of dentine profiles reveal that a lower proportion of famine burials exhibit stable dentine profiles and that several exhibit a pattern of opposing covariance between δ15N and δ13C. EH were also observed to have formed during or after the opposing covariance pattern for some individuals. Conclusions: The results of this study may reflect differences in diet between burial types rather than nutritional stress. Though nutritional stress could not be definitively identified using bone and dentine collagen, the results from dentine analysis support previous observations of biochemical patterns associated with nutritional stress during childhood. / Division of Behavioral and Cognitive Sciences. Grant Numbers: BCS‐1261682, BCS‐1540208. Office of the Vice President for Research, University of South Carolina. Grant Number: SPARC Fellowship Grant

This thesis in anthropology investigates how emergency is socially constituted as a named and actionable entity. Specifically, it asks how human values and techno-scientific practices contribute to the constitution of emergency in the context of medical humanitarian intervention. The study considers emergency from an ethnographic perspective, as a group of international medical humanitarian practitioners from the aid group Médecins San Frontières (MSF) come to understand and respond to the 2013 outbreak of armed conflict in South Sudan and the potential for mass starvation among certain groups within that country. Through the method of participant observation, it examines how emergency is understood or constituted at three different conceptual levels: at the level of the individual clinical encounter, the level of population statistics, and the level of political representations of crisis. By extension, it inquires as to how professional formation and moral categories determine appropriate response. The study reveals how values, ethics and conceptions of "the good" are embodied in-yet imperfectly translated through-numerical measures and institutional structures. This reveals a key paradox of medical humanitarianism: that rational, technocratic institutions simultaneously enable and debilitate the goals and means of humanitarian action. This study is based on 11 months of fieldwork (Oct 2013-Sept 2014) with the Amsterdam operational section of MSF. The fieldwork was multi-sited; it included participant observation of MSF activities in Amsterdam (The Netherlands), Juba, Leer and Bentiu (South Sudan).

This thesis explores the origin of one of the most engrossing concerns of the post-colonial Indian state, that is, its extensive, intricate, and expensive feeding arrangements for the civilians. It tracks the colonial origin of the post-colonial welfare state, of which state-management of food is one of the most publicized manifestations. This thesis examines the intervention of the late colonial British state in food procurement and distribution in India during the Second World War, and various forms of such intervention, such as the introduction of food rationing and food austerity laws. It argues that the war necessitated actions on the part of the colonial state to secure food supplies to a vastly expanded British Indian Army, to the foreign Allied troops stationed in India, and to the workers employed in war-industries. The thesis brings forth the constitutional and political predicaments that deprived the colonial central government's food administration of success. It further reveals how the bitter bargaining about food imports into India between the Government of India and the War Cabinet in Britain hampered the state efforts to tackle the food crisis. By discussing the religious and cultural codes vis-à-vis food consumption that influenced government food policies, this thesis has situated food in the historiography of consumption in colonial India. In addition to adopting a political approach to study food, it has also applied sociological treatment, particularly while dealing with how the wartime scarcity, and consequent austerity laws, forced people to accept novel consumption cultures. It also contributes to the historiography of 'everyday state'. Through its wartime intervention in everyday food affairs, the colonial state that had been distant and abstract in the perception of most common households, suddenly became a reality to be dealt with in everyday life within the domestic site. Thus, the macro state penetrated micro levels of existence. The colonial state now even developed elaborate food surveillance to gather intelligence about violation of food laws. This thesis unravels the responses of some of the political and religious organizations to state intervention in quotidian food consumption. Following in this vein, through a study of the political use of famine-relief in wartime Bengal, it introduces a new site to the study of communal politics in India, namely, propagation of Hindu communal politics through distribution of food by the Hindu Mahasabha party. Further, it demonstrates how the Muslim League government's failure to prevent the Great Bengal Famine of 1943-44 was politically used by the Mahasabha to oppose the League's emerging demand for the creation of Pakistan.

No description available.

Historical evidence from contemporary documents established that Irish migrants to London during the Great Irish Famine (1845-1852) were likely to come from low socio-economic groups in south-west Ireland, and has characterised mid-19th-century health status and living conditions in both locations. Using samples from 119 individuals from the Catholic cemetery at Lukin Street, London (1843-1854) and 20 from the Union Workhouse Famine cemetery, Kilkenny, Ireland (1847-51), mean bone collagen isotope values were established for the well-documented Irish pre-Famine potato-based diet (¿15N 10.6¿, ¿13C -19.1¿), and the diet of contemporaneous Londoners (¿15N 12.6¿, ¿13C -19.1¿). The introduction of maize as a short-term Famine relief food was identified in three Kilkenny juveniles with bone collagen ¿13C above -17¿, and incremental dentine collagen demonstrating temporal changes in ¿13C consistent with dietary change from C3 to C4 plants. Bone collagen values for two Lukin Street individuals were consistent with high marine protein consumption. Techniques developed in this study to sample increments of dentine representing nine months or less of life have improved temporal resolution not only for migration events but also short-term dietary changes and physiological status during childhood. Combining epigraphic, osteological and archaeological evidence, individual ¿lifeways¿ have been constructed using isotope data and provide insights into the connection between health, diet and skeletal manifestations of deprivation during childhood and adolescence. New models are investigated for examining maternal and infant health using dentine collagen increments formed in utero and combining dentine and bone collagen values to explore the effects of nutritional stress on bone turnover. / Arts and Humanities Council. The British Federation of Women Graduates (the Eila Campbell scholarship). The British Association for Biological, Anthropology and Osteoarchaeology (the Jane Moore prize).